Fog stream nozzle



Feb. 15, i944. G. F. Hums'ry FOG STREAM NOZZLE Filed July 28, 1942codici! iiOill rammed Feb. 1s, 1944 UNITED STATES PATENT OFFICE Thisinvention relates to a fog stream nozzle, or as it is sometimes called,a tog nozzle.

One of the objects of this invention is the provision of means in a fognozzle that will enproducing aperture or apertures. and the impuritiesare ejected from the screen and nozzle through such other aperture. Thisresult is accomplished by structure that is simple, economical able theoperator thereof to maintain the maxi- 5 to make, compact and reliable.mum eiliciency oi the nozzle for producing a fog- Fig. l is anelevational view of the nozzle. like spray irrespective of insolublematerial in Fig. 2 is a sectional view taken along line 2-2 the fluid orliquid being conducted to the nozzle of Fig. 1. that would ordinarilyimpair the eiliciency of the In detail, the nozzle illustrated in thedrawing nozzle. l comprises an elongated body I, which may be a Anotherobject is the provision of a nozzle that, casting, and which body isprovided with a pair of when connected with a source of fluid underpresseparate passageways 2, 3 therein, extending lonsure. has means formaintaining the fog producgitudinally thereof. For convenience ofdescriping discharge aperture or apertures clear of fortion, thepassageway 2 will be called the upper eign material in the fluidconducted to the nozzle l5 passageway, and passageway 3 will be calledthe and for electing Such particles from the nozzlelower passagewaysince this is their relation as A still further object is a fog nozzleprovided shown in Fig. 2., although it is to be understood with adischarge aperture or apertures for ejecthat this relationship is notessential to the action oi a iluid therefrom, and which nozzle has acomplishment of the desired results. In actual screen therein forobstructing the passage of foruse the position of the passageways may berereign solids of predetermined size te such aperture versed from thatshown in the drawing or they or apertures, and which screen is soarranged in may both be ln any plane between horizontal and the nozzleas to be capable of being cleared of vertical. such solids by uidpassing through the nozzle The upper passageway 2 has a co-axialinwithout dismantling the nozzle or any part thereteriorly threadedinlet opening 4 at one end and 0f and WithOllt mOVinB the screen orcreating a a co-axial discharge opening 5 at the other end. trai) oreddy space Where impurities might ledge or Adjacent the inlet opening aportion of the pasbe retained in the nozzle. sageway is enlarged toprovide a substantially Other Objects and advantages will appear inannular portion which constitutes a chamber 5 the description. betweenthe inlet opening 4 and the passageway The fog producing dischargeaperture or aper- 2, communicating inter-axially with both. tures in afog nozzle are necessarily relatively Aradially, inwardly projecting,annular angeI small, since the fluid, such as water for example, isformed in body I at the juncture between is broken up to fog-like format or adjacent chamber 6 and inlet 4 and forms one side of said suchapertures. Since one of the principal uses chamber. The side of flange'I that faces into 0f a fog nozzle is in lighting res. it is obvioussaid threaded inlet 4 provides an abutment for that failure of thenozzle to produce the desired a radially outwardly projecting flange 8that is fog-like spray may well result in destruction formed on thelarger diameter end of a frustoof the property that would otherwise besaved. conical screen 9, and which screen extends across With myinvention, the nozzle may be quickly the open side of channel 6. andthoroughly cleared of impurities-that would The smaller diameter end ofscreen 9 ts into impair the efliciency of the fog creating function anannular recess formed by a tapered enlargeof the nozzle before theimpurities reach the fog ment in the end of passageway 2 adjacentchamproducing discharge apertures, and the nozzle ber 6. 'Ihus it isseen that the inner sides of also provides means for electing a solidstream 5 screen 9 extend convergently from inlet 4 through of water orfluid when such stream is needed. chamber 8 to passageway 2. This resultof maintaining the fog producing A plug valve Ill is provided in body Iand exapertures clear of impurities is accomplished by tends across theupper passageway 2 adjacent a stationary compact screen of perforatedmetal chamber 6. This valve has a handle II proor wire mesh. having arelatively large capacity jecting from one side of body I for manuallyto pass iluid through the openings so as to proturni the valve from aposition closing passageduce the proper fog stream, and which screen mayway 2 flow of duid therethrough to a position be quickly cleaned ofimpurities by a momentary opening said passageway and vise versa.ejection of the iluid from the nozzle through an- The lower passageway 3communicates at one other aperture or discharge opening than the fog endwith the chamber G at a point spaced radially outwardly of screen 9, andthe opposite end of said passageway 3 communicates with the inner,spaced ends of one or more pairs of relatively small diameter, outwardlyconverging fog-spray discharge passageways I2.

While rotary plug members I3, I4 are indicated in the drawing extendingacross passageways I2, and respectively provided with transverseopenings coaxial with passageways I2, it is to be understood thatinsofar as this invention is concerned, the said members may be integralwith body I and in the description and claims the passageways I2 includethe openings in the members I3, I4 as portions of said passageways.

The passageways I2 are arranged so that the paths of streams of water orfiuid passing therethrough will intercept at a point relatively close tothe body I and adjacent the convergent ends of said passageways toproduce the fog-like spray.

Adjacent the chamber 6 a plug valve I5 is provided in passageway 3. Thisvalve is mounted in body I for rotation to open and close passageway 3to flow of fluid therethrough from the chamber 6 upon manualmanipulation of handle I6 on said valve. Handle IB projects from theside of body I opposite the handle I I on valve I0.

In operation, assuming the inlet 4 is connected with a fiuid pressureline and valve I is closed while valve I5 is open, the fluid will passthrough the perforations in screen 9 and into chamber 6, and fromchamber 6 into passageway 3 forejection through the discharge aperturesI2. Any material in the fluid that would tend to block up passageways I2 is caught by the tubular screen 9, and never passes to saidpassageways I2. As soon as it is apparent that the fog stream isimpaired by material caught by the screen, the operator merelymomentarily opens valve IIJ, and as inlet 4, screen 9 and passageway 2are coaxial, the fluid will all tend to be discharged from passageway 2,which is of sufliciently large diameter to freely conduct the foreignmaterial therethrough. The angular relation between the inner sides ofscreen 9 on which the foreign matter collects and the axis of the screenis such that the dynamic pressure of the fluid moving axially throughthe tubular screen and into passageway 2 will forcibly remove any matterthat might tend to stick in the perforations of the screen. It

is obvious, of course, that a stronger cleaning action can be producedby merely closing valve I5 when valve II) is opened. to thereby causeall of the fiuid entering inlet 4 to be passed axially through screen 9and passageway 2.

By manipulation of valves I0, I5, the operator may eject a full solidstream from passageway 2, or a combination of a fog stream and a solidstream as desired.

While I have shown a particular arrangement of passageways I2 forproducing a fog stream, it is to be understood that any desired type offog creating discharge apertures may be used. Also, while screen 9 ispreferably of -generally frustoconical form as illustrated, it may becylindrical.

The inside diameter of inlet 4 is slightly greater than the outsidediameter of flange 8 on screen 6, making it easy to remove screen 9 uponuncoupling the inlet from the source of fluid to be ejected from thenozzle. Thus, any desired mesh screen may be quickly positioned in thebody I or replacement of damaged screens may be as easily effected.

Having described my invention, I claim:

1. A nozzle of the character described, comprising a body provided withan inlet opening in one end, a tubular screen and a first passageway inend-to-end coaxial alignment with said screen positioned between saidinlet and said passageway and with the end of said passageway remotefrom said screen opening outwardly of said body; a second passageway insaid body offset to one side only of said first passageway provided witha fog producing discharge aperture opening outwardly of the body at oneof its ends and the opposite end thereof communicating with the outersides of said scree alve means in said first passagewayoperablenihom'ng'saidirst'passageway to thereby cause fluid enteringsaid inlet to pass through said screen to said second passageway forejection from the latter.

2. A nozzle of the character described, comprising a body providedtherein with an inlet opening in one end, a tubular screen, and a firstpassageway in end-to-end coaxial alignment with said screen positionedbetween said inlet and said passageway and with the end of saidpassageway remote from said screen opening outwardly of said body; achamber formed in said body, the walls of which are spaced radially fromsaid screen; a second passageway in said body provided with a fogproducing discharge aperture opening outwardly of the body at one of itsends and the opposite end thereof opening into said chamber; a valve insaid first passageway for closing said first passageway to thereby causefiuid entering said inlet to pass through said screen to said secondpassageway and for opening said rst passageway to direct flow of fiuidaxially through said screen to said first passageway; said screen beingof substantially frustoconical shape with its larger diameter endpositioned adjacent said inlet and the major portion of said screen thatextends between said inlet and said first passageway being unobstructedat all times to passage of uid therethrough into said chamber.

3. A nozzle of the character described comprising a body provided withan inlet opening in one end, a tubular screen, and a first passageway inend-to-end coaxial alignment with said screen positioned between saidinlet and said passageway, and with the end of said passageway remotefrom said screen opening outwardly of said body; a second passageway insaid body provided with a fog producing discharge aperture openingoutwardly of the body at one of its ends, and the opposite end thereofcommunicating with the outer sides of said screen; valve meansrespectively positioned in said first passageway and in said secondpassageway for opening and closing either or both passageways to passageof fluid therethrough as desired, the valve means in said firstpassageway being adapted to cause fluid entering said inlet to passthrough said screen to said second passageway for discharge from saiddischarge 3 aperture when the valve means in said first pas- 1 sa-gewayis closed and the valve means in said second passageway is open.

4. A nozzle of the character described, comprising an elongated bodyprovided with an inlet at one end, a tubular screen, and a firstpassageway in end-to-end coaxial relation disposed longitudinally ofsaid body with said screen disposed between said inlet and saidpassageway and with one end of said passageway opening outwardly of theopposite end of said body; a second passageway in said body offset toone side only of said first passageway and extending substantiallyparallel with said ,rst passageway, provided with a fog producingdischarge aperture opening outwardly of said opposite end of said body;said screen being spaced at its sides from the material of said body andthe end of said second passageway opposite its fog producing aperture,opening into the space around said screen; valve means carried by saidbody for controlling the flow of fluid entering said inlet to one or theother of said rst and second passageways as desired, and the ends ofsaid screen being in direct substantially sealing relation with thewalls of said inlet and said rst passageway whereby the only access offluid to said second passageway from said inlet is through theperforations in said screen.

5. A nozzle of the character described, comprising a body formed with aninlet opening for fluid in one end thereof; a tubular open-ended, screenspaced within said body in coaxial alignment with said inlet and withone of its ends secured in said inlet; a chamber at one side of thelatter formed in said body enclosing said screen with its walls spacedtherefrom around the sides of the screen; a passageway communicating atone of its ends with said chamber and provided at its opposite end witha fog producing discharge aperture opening outwardly of said body; meansfor openk ing and closing said screen to flow of fluid from said inletaxially therethrough and radially thereof through its perforations asdesired, said means including a valved conduit opening at one end at alltimes directly into the open-end of said screen opposite said inletopening.

6. In a construction as defined in claim 5, said screen being ofgenerally frusto-conical shape with its larger diameter end in saidinlet, and

said inlet opening being of a diameter greater than the largest diameterof said screen whereby the latter is removable from within said chamberthrough said inlet opening.

7. A nozzle of the character described, comprising an elongated bodyhaving therein an openended, through conduit extending longitudinallytherethrough from end to end thereof; a section of the walls of saidconduit spaced from its ends being perforated; a passageway formed insaid body communicating at one of its ends with said section and havinga fog producing discharge aperture at its opposite end opening outwardlyof said body adjacent one of the open ends of said conduit; valve meansin such body spaced from said section for closing and opening theportion of such conduit at one end only of said section to passage offluid therethrough, and the portion of said conduit at the other end ofsaid screen being threaded for connection with the fitting of a fluidpressure line, said perforated section being of progressively smallerdiameter from the end thereof adjacent said last mentioned threadedportion of said conduit toward the other portion of said conduit, andsaid other portion of said conduit being of a diameter about equal tothe smallest diameter of said perforated section.

8. A fog nozzle provided with a fog producing discharge aperture at oneend, a passageway therethrough communicating with said aperture at oneof its ends, and an inlet opening in the opposite end of said nozzle incommunication with the other end of said passageway; a screen in saidbody interposed between said inlet and said aperture adapted to pass aliquid from said inlet at right angles to said screen and in onedirection through its perforations for passage thereof to said aperture;said screen being positioned with its sides extending generally in thesame direction as the axis of said opening, and means including a valvedpassageway having its valved passageway will flow over the walls of saidscreen substantially parallel with the latter for clearing foreignmaterial from said walls, the adjacent connected ends of said valvedpassageway i and said screen being of substantially the sameA diameter.

9. A nozzle of the character described comprising an elongated bodyhaving a pair of substantially parallel passageways therein openingoutwardly of one end of said body at one of their corresponding endsproviding for discharge openings at said one end; an inlet openingformed in the opposite end of said body co-axial with one passageway ofsaid pair; a portion of said one passageway adjacent said inlet beingenlarged to provide a substantially annular chamber between said inletopening and said one passageway communicating inter-axially between saidpair of passageways; a frusta-conical screen co-axial with said inletopening connected with the sides thereof at its larger diameter end andconnected with the adjacent end of said one passageway at its smallerdiameter end; the outer sides of said screen between its ends beingfully exposed to define the radially inner wall of said annular chamber,and the adjacent ends of said screen and said one passageway being ofsubstantially the same diameter for unobstructed flow of fluid from saidscreen into said latter passageway.

10. A nozzle ofthe character described comprising an elongated bodyhaving a pair of substantially parallel passageways therein openingoutwardly of one end of said body at one of their corresponding endsproviding for discharge openings at said one end; an inlet openingformed in the opposite end of said body co-axial with one passageway ofsaid pair; a portion of said one passageway adjacent said inlet bein-genlarged to provide a substantially annular chamber between said inletopening and said one passageway communicating inter-axially between saidpair of passageways; a frusta-conical s n co-axial with said inletopening connected w1 he sides thereof at its larger diameter end andconnected with the adjacent end of said one passageway at its smallerdiameter end; the outer sides of said screen between its ends beingfully exposed to dene the radially inner wall of said annular chamber,and the adjacent ends of said screen and said one passageway being ofsubstantially the same diameter for unobstructed flow of fluid from saidscreen into said latter passageway, a pair of valves respectivelypositioned in said passageways and actuatable independently of eachother for opening and closing either or both 0f said passageways to flowof fluid therethrough as desired.

11. A nozzle of the character described comprising an elongated bodyhaving a pair of substantially parallel passa-geways therein openingoutwardly of one end of said body at one of their corresponding endsproviding for discharge openings at said one end; an inlet openingformed in the opposite end of said body co-axial with one passageway ofsaid pair; a portion of said one passageway adjacent said inlet beingenlarged to provide a substantially annular chamber between said inletopening and said one passageway communicating inter-axially between saidpair of passageways; a frusto-ccnical screen co-axial with said inletopening connected with the sides thereof at its larger diameter end andconnected with the adjacent end of said one passageway at its smallerdiameter end; the outer sides of said screen between its ends beingfully exposed to define the radially inner wall of said annular chamber,and the adjacent ends of said screen and said one passageway being ofsubstantially the same diameter for unobstructed iiow of fluid from saidscreen into said latter passageway, the

inner sides of said inlet opening being threaded outwardly of the end ofthe screen that is connected with said inlet for threadedly securing athreaded fitting of a iiuld pressure line therein, and for securing saidscreen stationary between such tting and the end of the passageway thatis connected with the smaller diameter end of said screen.

GORDON F. HURST.

